Alert archive / Alabama / Mesoscale Discussions in 2003
Mesoscale Discussion 191
The Storm Prediction Center issued this mesoscale discussion at Mar 5, 2003, 6:58 PM CST for Bibb County, Chilton County, Perry County, Alabama. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- Mar 5, 2003, 6:58 PM CST (00:58 UTC)
- Expired
- Mar 5, 2003, 8:00 PM CST
- In force
- 62 min
- Issued by
- the Storm Prediction Center
Counties Bibb County, AL, Chilton County, AL, Perry County, AL
The radar
The Birmingham radar (KBMX), 40 km from the middle of the area, began a volume at 00:57 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 1.0 hours before the alert went out and 40 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 446 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 245 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
958 ACUS11 KWNS 060059 SWOMCD SPC MCD 060058 ALZ000-060200- MESOSCALE DISCUSSION 0191 NWS STORM PREDICTION CENTER NORMAN OK 0658 PM CST WED MAR 05 2003 AREAS AFFECTED...AL CONCERNING...TORNADO WATCH 28... VALID 060058Z - 060200Z DAMAGING WINDS LIKELY FROM NEAR TCL TO 45 WSW 0AS AS SMALL BOW ECHO ECHO MOVES ENEWD AT 50 KT. POTENTIAL FOR TORNADOES WITH THIS SYSTEM PERSIST. LATEST SURFACE ANALYSIS INDICATES WARM FRONT EXTENDS FROM SUMNER COUNTY EWD TO NEAR THE DALLAS/PERRY COUNTY BORDER AND INTO AUTAUGA COUNTY. BOW REMAINS SLIGHTLY ELEVATED WITH DAMAGE WINDS LIKELY AND SMALLER THREAT FOR TORNADOES. HOWEVER...THE WARM FRONT IS ADVANCING NWD AT 10 TO 15 KT AND CURRENT MOTION OF BOW MAY RESULT IN THESE TWO FEATURES INTERSECTING NEAR PERRY/CHILTON/BIBB COUNTIES. RECENT DIAGNOSTIC ANALYSIS INDICATES THAT THE 1KM SRH HAS INCREASED TO NEAR 250 M**2/S**2 AND MLCAPES ARE NEAR 1000 J/KG /SOUTH OF THE WARM FRONT. ENVIRONMENTAL PARAMETERS SUGGESTS THE THREAT FOR TORNADOES WILL INCREASE AS THE BOW MOVES INTO CENTRAL AL DURING THE NEXT HOUR OR SO. ..IMY.. 03/06/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... 33038703 33008730 32748742 32568722 32788653 33008661
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 5, 8:10 PM CST | Severe Thunderstorm Watch | SPC | Autauga, Calhoun, Chambers, Clay, Cleburne, Coosa and 9 more | 4 hr |
| Mar 5, 9:49 PM CST | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 16 more | 116 min |
| Mar 6, 3:30 AM CST | Mesoscale Discussion | SPC | Autauga, Bibb, Butler, Chambers, Chilton, Choctaw and 17 more | 90 min |
| Mar 6, 5:39 AM CST | Mesoscale Discussion | SPC | Autauga, Barbour, Bullock, Butler, Chambers, Clarke and 16 more | 96 min |
| Mar 6, 7:37 AM CST | Mesoscale Discussion | SPC | Barbour, Bullock, Chambers, Crenshaw, Elmore, Lee and 5 more | 83 min |
Nearby
Mesoscale Discussions in Alabama, 2003Every mesoscale discussion in 2003
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.